A credit memo cannot be cancelled directly from the Transactions page. However, it can be reversed through invoice creation.
Create a Debit Memo via Invoice Creation
Follow the standard Invoice Creation process.
On the Document Details tab, select the applicable Debit Memo.
Complete the invoice creation.
Apply the Debit Memo to the Credit Memo
Return to the Credit Memo that needs to be cancelled.
Select the newly created Debit Memo.
Close the Credit Memo by applying the Debit Memo.
The credit memo will automatically close once invoices have been fully allocated. See credit memo allocation process here.
Go to Credit Memo and select the specific credit memo document.
Go to the Application History tab and view the invoices applied.